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4726245 
Journal Article 
Microcellular Foaming of PVC/NBR Thermoplastic Elastomer 
Shakarami, K; Doniavi, Ali; Azdast, T; Aghdam, KM 
2013 
1 
Materials and Manufacturing Processes
ISSN: 1042-6914 
28 
8 
872-878 
English 
WOS:000327841200003 
This article studies the relationships between processing parameters (including foaming temperature and foaming time) and mechanical and structural properties of microcellular foams of poly vinyl chloride (PVC)/nitrile butadiene rubber (NBR) thermoplastic elastomer. In this research, miscible blends of PVC/NBR were foamed using a batch system with carbon dioxide as a blowing agent. Two different PVC/NBR composites (PVC/NBR 5%, PVC/NBR 15%) were used in the experiments. Tensile strength, elastic modulus, and elongation at the break were considered as the mechanical properties of samples. Foam density, cell density, and average cell size were studied in the obtained foams. Results show that foaming parameters considerably influence the mechanical and structural properties of resultant foams. Under most processing conditions, favorable results were obtained based on the design criteria of the foamed parts. 
Foam; Mechanical; Microcellular; Microstructural; NBR; Property; PVC